文本处理小程序有bug

 public void chuli(String filename) throws Exception{
 
         FileInputStream s = new FileInputStream(filename);
          BufferedReader b = new BufferedReader(new InputStreamReader(s));
          String a1=b.readLine();
 
          while(a1!=null){
 
 
 
             //System.out.println("一层"+a1.toString());
              if(a1.equals("(@"))
              {
                  a1=b.readLine();
 
                String[] temp=new String[1000];
                int i=1;
 
                  while((!a1.equals(")@"))){
                     // a1=b.readLine();
                     // System.out.print("erer层");
                     temp[i]=a1;
                     // j++;
                     // System.out.print("erer层");
                     i++;
                      a1=b.readLine();
                      }
 
                 i=1;
                  a1=b.readLine();
                  if(!a1.contains("&")){
                      String b5=a1;a1=b.readLine();
                      temp[0]=b5+"  "+a1;
                      a1=b.readLine();
                  }
                  else;
                  while(!a1.equals("(@")&&a1!=null){
                      if(a1.contains("&"))
                      {
                          String[] te=a1.split("&");
                          for(int k=0;k<temp.length;k++){
                             String[] tm= temp[k].split(" ");
                             String tem="";
                             for(int g=0;g<tm.length;g++){
                                 if(!tm[g].equals(""))
                                 {
                                     tem=tm[g];
                                     break;
                                 }
                             }
                              if(tem.equals(te[1]))
                                  {
                                  temp[k]=b.readLine()+","+temp[k];
                                  a1=b.readLine();
                                  break;
                                  }
                          }
                      }
                      else a1=b.readLine();
                  }
                  System.out.println();
                  System.out.println();
                  System.out.println();
                  for(int k=0;k<1000;k++)
                     if(temp[k]!=null) System.out.println(temp[k]);
                     else break;
              }
          }
        }